Visits * Conversion

A discrepancy as small as .2% (either positive or negative) sounds like it might be a rounding error. When you multiply visits by conversions you could end up with a number that isn't a whole number (ex, 10 visits and a conversion of 23% would equal 2.3 orders). But in actual data, you can't have a partial order, either someone places an order or they don't, so something like 2.3 orders wouldn't be possible, it would have to be 2 orders or 3 orders. When you get into big numbers and multiple different time periods, it becomes more possible that if your rounding numbers there will be a slight discrepancy between an estimate and an actual number.

Do you have anything else happening in your table or panel? Any Segments that might be causing some minor issues? Are you running this on a Virtual Report suite that might be using a segment that is causing a discrepancy?

When I do this in my data, it lines up exactly. If you can't show your data here publicly, would you be able to share a small sample directly with me in private messaging? So I can see your setup and maybe be able to spot something that I can't from your description?